Method and device for monitoring uniaxial compression cross section area of concrete in real time

Abstract

The invention discloses a method and a device for monitoring the uniaxial compression cross section area of concrete in real time. The method comprises the following steps: preparing a tested concretestandard test block; sleeving a strain band on the tested concrete standard test block; placing the tested concrete standard test block sleeved with the strain band at a pressurizing station of a testing machine; starting the testing machine to pressurize the tested concrete standard test block, and reading stress data of the tested concrete standard test block after being pressed by the strain band; and drawing a stress-strain curve of the uniaxial compression cross section area of the concrete by utilizing the pressurization data of the testing machine and the stress data read by the strainbelt. By sleeving the tested concrete standard test block with the strain band, reading the stress data pressurized by the testing machine and matching the stress data with the pressurization data ofthe testing machine, the stress-strain relationship of the concrete in a uniaxial compression state is reflected in real time, more accurate curve data is brought to the research of materials. Therefore, the stress-strain relationship is reflected in real time, and a reliable basis can be provided for structural design.

Description

technical field [0001] The invention relates to the field of civil engineering, in particular to a method and a device for real-time monitoring of the uniaxially compressed cross-sectional area of ​​concrete. Background technique [0002] In civil engineering, the strength of concrete materials (compressive strength standard value, compressive strength design value) is the result of multiple sets of uniaxial compression experiments through probability statistics. The dimension of strength is the dimension of stress (stress = force / area). When conducting concrete uniaxial compression experiments, the applied pressure can be read out in real time by the testing machine, but since the continuous change of cross-sectional area is difficult to monitor, the calculation of stress in civil engineering applications still uses the original cross-sectional area to calculate Stress, and then define the strength value of the material for use in civil engineering design. However, the str...

AI Technical Summary

Problems solved by technology

[0003] Theoretically, the lateral strain can be obtained by multiplying the vertical strain by Poisson's ratio, but this is only an approximate value. The strength of concrete is highly discrete, so this theory cannot truly reflect the real lateral deformation of concrete.

At this stage, there is no relevant device specifically for measuring the real-time deformation of the cross-section of concrete under uniaxial compression.

Images